EPSON Stylus COLOR 860/1160
Revision C
Troubleshooting
Overview
72
6
Is any ink tube
disconnected from
the cap unit?
Referring to the figure below, check the following
points:
• The ink tube is inserted to the Cap assembly
securely as following figure.
• There is no damage on the ink tube.
7
Is the FFC
disconnected from
the printhead board?
Remove the Head FFC holder from the CR unit,
and check that two FFC are properly connected.
Even though no slant connection or disconnection
is found, disconnect the FFC once and install them
again.
Table 3-15. Cleaning does not Solve the Print Problem (continued)
Step
Check Point
Action
Head Board
Head FFC
8
Is the head driver
transistor defective?
If you see the C298 Main from the heat sink side,
the following two power transistors can be found:
• Q3 and Q4: Outputs the common voltage
To check if each pair transistor is working properly,
check the trapezoid waveform at the emittor
terminal of the charging side. Check the waveform
while running a print.
• Check the continuity of each transistor by
referring the Step 11 for the “Isolating the Faulty
Part on the Power Supply Board”
NOTE:
Frequency of waveform and voltage level
(p-p) varies if printing is performed
through the driver. Therefore, as long as
the trapezoid waveform is output, the
head driver IC is considered good, and
the printhead must be replaced in that
case.
Table 3-15. Cleaning does not Solve the Print Problem (continued)
Step
Check Point
Action
Содержание Stylus COLOR 1160
Страница 8: ...C H A P T E R PRODUCTDESCRIPTION ...
Страница 28: ...C H A P T E R OPERATINGPRINCIPLES ...
Страница 53: ...C H A P T E R TROUBLESHOOTING ...
Страница 74: ...C H A P T E R DISASSEMBLYANDASSEMBLY ...
Страница 116: ...C H A P T E R ADJUSTMENT ...
Страница 150: ...C H A P T E R MAINTENANCE ...
Страница 160: ...APPENDIX C H A P T E R ...
Страница 171: ...PSON Stylus COLOR 860 1160 Revision C ppendix Circuit Board Component Layout 171 Figure 7 5 C298PNL Component Layout ...